Bnc SAM 935 Portable Gamma Spectroscopy System Manual de usuario descargar pdf (Pagina 39)

SAM 935™ Instruction Manual 35

5.4.2 Manual Hardware Adjustments

HW Adj/HW Info This key switches the information displayed in the data window to the

hardware parameters.

When HW A

DJ/HW INFO is selected from the Presets screen, a set of hardware parameters is listed in the

data window. The F4 function key becomes a D

ATA key that returns the system to the data mode.

HV Supp Displays the state of the bias voltage supply – on or off.

BIAS Current bias voltage setting. This voltage ranges from 200 to 1000 volts.

CG Amplifier coarse gain. Available values are 1, 2, 4 and 8.

FG Amplifier fine gain. Range is 1.00 to 2.55 in steps of 0.01.

LLD Low level discriminator. Range is from 0 to 105 percent of full scale in

steps of approximately 0.4%. For normal work the LLD should be set to

0.8 or 1.2.

ULD Upper level discriminator. Range is from 0 to 105 percent of full scale in

steps of approximately 0.4%. For normal work the ULD should be set to

105%.

ZERO ADC zero setting. Range is ±5% of full scale.

XFRM Conversion mode. The system is optimized for QCC (SQRT) mode. All of

the analyses should be done in this mode. Standard linear mode is pro-

vided for those who desire it.

Under manual MCA mode (the HW A

DJ mode), it is possible to adjust these hardware parameters. In other

screen modes (HW I

NFO), they may only be viewed.

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Bnc SAM 935 Portable Gamma Spectroscopy System Manual de usuario Pagina 39